Amazon.com: ECOTRIC Behind Seat Speaker Brackets Square Body Replacement Compatible with 1973-1987 Chevy/GMC C10 Single Cab or Crew Cap Pickup for 6x9 Speakers : Automotive
Any suggestions for speaker placement? Ive had them behind the side screens but the sound gets to blurry. : r/ultrawidemasterrace
Do You Need Sound Treatment Behind Speakers? – SoundAssured
High Fidelity
Bass trap behind front mains (distance to wall) | AVS Forum
Glass Behind Speakers: What Type of Acoustic Treatment Should I Use? | Sound & Vision
A behind-the-scenes look at Polk Audio's Legend Series speakers
Front Wall Treatments
System update April 2017 – audio at home
Is The Window Behind My Speakers Causing Problems? - AcousticsInsider.com - YouTube